add utils for pod condition

pkg/kubelet/types/pod_status.go

+/*
+Copyright 2018 The Kubernetes Authors.
+
+Licensed under the Apache License, Version 2.0 (the "License");
+you may not use this file except in compliance with the License.
+You may obtain a copy of the License at
+
+    http://www.apache.org/licenses/LICENSE-2.0
+
+Unless required by applicable law or agreed to in writing, software
+distributed under the License is distributed on an "AS IS" BASIS,
+WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+See the License for the specific language governing permissions and
+limitations under the License.
+*/
+
+package types
+
+import (
+	"k8s.io/api/core/v1"
+)
+
+// PodConditionsByKubelet is the list of pod conditions owned by kubelet
+var PodConditionsByKubelet = []v1.PodConditionType{
+	v1.PodScheduled,
+	v1.PodReady,
+	v1.PodInitialized,
+	v1.PodReasonUnschedulable,
+}
+
+// PodConditionByKubelet returns if the pod condition type is owned by kubelet
+func PodConditionByKubelet(conditionType v1.PodConditionType) bool {
+	for _, c := range PodConditionsByKubelet {
+		if c == conditionType {
+			return true
+		}
+	}
+	return false
+}

pkg/kubelet/types/pod_status_test.go

+/*
+Copyright 2018 The Kubernetes Authors.
+
+Licensed under the Apache License, Version 2.0 (the "License");
+you may not use this file except in compliance with the License.
+You may obtain a copy of the License at
+
+    http://www.apache.org/licenses/LICENSE-2.0
+
+Unless required by applicable law or agreed to in writing, software
+distributed under the License is distributed on an "AS IS" BASIS,
+WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+See the License for the specific language governing permissions and
+limitations under the License.
+*/
+
+package types
+
+import (
+	"k8s.io/api/core/v1"
+	"testing"
+)
+
+func TestPodConditionByKubelet(t *testing.T) {
+	trueCases := []v1.PodConditionType{
+		v1.PodScheduled,
+		v1.PodReady,
+		v1.PodInitialized,
+		v1.PodReasonUnschedulable,
+	}
+
+	for _, tc := range trueCases {
+		if !PodConditionByKubelet(tc) {
+			t.Errorf("Expect %q to be condition owned by kubelet.", tc)
+		}
+	}
+
+	falseCases := []v1.PodConditionType{
+		v1.PodConditionType("abcd"),
+	}
+
+	for _, tc := range falseCases {
+		if PodConditionByKubelet(tc) {
+			t.Errorf("Expect %q NOT to be condition owned by kubelet.", tc)
+		}
+	}
+}